Welded column and process of making it



LE ROY BRAISTED WELDED COLUMN AND PROCESS OF MAKING IT Filed Aug. 14, 1922 1 by the welding Patented Feb. 5, 1924. 1

UNITED ST TES PATENT on-ice.

LE BOY BBAISTE), OI WESLEY, IASSACHUSETTS, ASSIGNOB '1'0 moan m! FOUNDRY, 01 11141081), IASSAOHUSETTS.

Wn-DED COLUIIT AND PROCESS O! IT.

Application ma s m 14, 1022. sum in. season.

To all whom it may concern:

Be it known that I, L1: B0! Bans'ran, a citizen of the United States, residing at Wellesley in the county of Norfolk and State of Massachusetts, have invented new and useful Welded Columns and Processes of Making Them, of which the following is a specification.

' This invention relates to a. column or ipe formed of two pieces of piping or tn ing welded together. g

The principal object of this invention is to provide a practical and eflicient means for utilizing the ends of pipes and tubes that have to be cut ofi in various industries but particularly in the making of columns. The piping which is manufactured in the right sizes for use for concrete filled columns is made 18' long. The columns are usually or 12 feet long and the balance has to be cut off and is wasted usually. This percentage of, waste is very eat obviously and attempts have been ma e heretofore to eliminate it, or at least reduce it materially, of otherwise wasted short ends of pipe end to end. This has not been successful for the reason that not only is the weld necessaril visible but it leaves a weak zone around t e pipe or column which will render it unsafe for building purposes. I have found that by a very simple expedient I can electric weld the waste ends of two pipes so'that the lpipe or-column. will be stronger at the weld t an at any other point and at the same time have a structure which is entirely suitable for use as a concrete filled column? Reference is to be had to the accompanyin drawings, in which ig. 1 is a side view of a column constructed in accordance with this invention;

Fig. 2 is a side view onan enlarged scale of a art of such a column showing the welded joint and adjacent parts, and partly in section to show the interior, and

' Fi 3 is a sectional view of thejoint on the hue 3-3 of Fig.2.

In order to utilize the waste ends which are often 6 or 8 feet in length, I take two of the waste ends 10 and abut them together. Inside Iv place a lengthll of a pi of the next smaller size which just fits within the ends 10. This overlaps" at both ends and forms a strengthening piece for them. This inner pipe 11 can be of any desired length been welded. On account of placin but it should have a len h suflicient to extend materially beyond t e adjacent ends of the original pipes. I then weld the joint between the two pipes. This forms a circular weld 12 entirely around the structure. This weld extends in far enou h so that it welds the pipe length 11 to 0th of the pipe ends. In other words, it extends clear through the external pipe ends 10.

This welding can be done electrically in such a neatmanner that after the exterior is ground, the external ground surface is the onl thing that indicates the presence of the we (1. It can. then be ainted over or merely put out doors and le t to rust and it will not show externally the fact that it hles t e piece 11 inside fitting the interior 0 -the pipe ends 10 all around and extending the weld 12 into its surface so as to weld it to botlr of the other pipes at that point I provide a joint which is not only as strong as oint but is the pipe ends 10 at any other have used actually stronger. Although up some of the space inside the pipe ends,

this is a matter that does not interfere with the use of the device as a concrete filled column and it does not decrease the strength of the column in the least. I find that these columns welded in this way about at the center are even stronger than columnsmade of one piece of pipe and will pass all building inspection tests as well as standing all the strain which a column of that size is designed to resist.

In this way a great saving is provided and that is done with very little expense because the operation can be performed in a very short period of time and without anynexpensive apparatus to employed anyway. I find that the cost of the welding at this oint is about the same as the cost of a oot and a half of piping. Obviously therefore, the saving is substantiall equal to the e ense of the whole length of the column re need by that much length.

Wherever I have mentioned pipe or piping it will be understood as a generic term including steel tubes as well as iron Although I have illustrated and described ,only a single form of the invention and that does not have these respects but whatI do claim is 1. As an article of manufacture, a welded irpn concrete filled column consisting of a plurality of pipe ends placed end to end in registration with each other and provided with an inner pipe of the same material fitting the inside of the pi e ends all around and located at the joint etween them, the

abutting ends of the pipe ends being welded together and the weld extending to the surface of the said inner pipe, whereby that is welded to both of the plpe ends.

2. The process of making a concrete column that consists in placing a pair of pipe ends together end to end, placing a piece of the next smaller size pipe within them at the joint and lapping over the joint at both ends, electric welding the two pipe ends together at the 'oint all around the circumference, exten ing said electric weld all the Way through said pipes into contact with the surface of the inner pipe all around it, and then grinding oil the exterior surface to make it flush with the adjacent surfaces of the original pipe ends. 7

In testimony whereof'I have hereunto affixed my signature. 7

LE ROY BRAISTED. 

